Question: 
Write a function to remove everything except alphanumeric characters from a string.


Model's Code:
def remove_splchar(s):
    return ''.join(c for c in s if c.isalnum())



Sample Correct Code:
import re
def remove_splchar(text): 
 pattern = re.compile('[\W_]+')
 return (pattern.sub('', text))


Asserts:
assert remove_splchar('python  @#&^%$*program123')==('pythonprogram123')
assert remove_splchar('python %^$@!^&*()  programming24%$^^()    language')==('pythonprogramming24language')
assert remove_splchar('python   ^%&^()(+_)(_^&67)                  program')==('python67program')


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 173 of 974: 128/173 (73.98843930635837%): success